| 摘要 |
A gear mechanism is disclosed which is installed between the bottom of a trailer and the trunion shaft of a rear wheel assembly of the trailer to cause the rear wheel assembly of the trailer to rotate in the opposite direction from the turning direction of the forward end of the trailer. A plurality of pinion gears are rotatably mounted in the space between a hollow inner cylindrical member and a hollow outer cylindrical member. The inner and outer cylindrical members are secured at their bottom ends to a bottom ring gear and their top ends are received on thrust bearings mounted in a top ring gear. The top ring gear is attached to the bottom of the trailer and the bottom ring gear is attached to the trunion shaft of the rear wheel assembly. The toothed surface of the pinion gears are in rolling engagement on the rack gear portions of the top and bottom ring gears. As the trailer turns, the top ring gear rotates in one direction about the vertical axis and will transfer the force through the pinion gears to rotate the lower ring gear which is attached to the trunion shaft of the rear wheel assembly in the opposite direction. The amount of rotation of the rear wheels will determined by the gear ratios used in the device. The gear mechanism will decrease the amount of lane space needed to complete a turn and also provides better control of the total trailer while in operation.
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